Submission #1133278

#	Time	Username	Problem	Language	Result	Execution time	Memory
1133278		alterio	Comparing Plants (IOI20_plants)	C++20	0 / 100	0 ms	328 KiB

plants

#include <bits/stdc++.h>
#include "plants.h"

using namespace std;

const int mxn = 2e5 + 100;

int n, k;
int prf[mxn];

int get(int l, int r) {
	return prf[r] - (l ? prf[l - 1] : 0);
}

void init(int _k, std::vector<int> r) {
	k = _k;
	n = r.size();
	for (int i = 0; i < n; i++) prf[i] = (i ? prf[i - 1] : 0) + r[i];
	return;
}

// 1 > : -1 < : 0 ?
int compare_plants(int x, int y) {
	if (x < y) {
		int sum = get(x, y - 1); 
		if (abs(sum) == y - x) return sum / abs(sum);
	}
	else {
		int sum = get(x, n - 1);
		if (y) sum += get(0, y - 1);
		if (abs(sum) == (n - x + y)) return sum / abs(sum);
	}
	return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 14
• Subtask 3: 0 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 11
• Subtask 6: 0 / 15
• Subtask 7: 0 / 25